Finding the Fourth Proportional to 139,176.30, 208,758.78 and 64,271.82

Step by Step Solution

1. Step 1: Write the proportion equation
   139,176.30 : 208,758.78 = 64,271.82 : x
2. Step 2: Convert to fraction form
   139,176.30/208,758.78 = 64,271.82/x
3. Step 3: Cross multiply
   139,176.30x = 208,758.78 × 64,271.82
4. Step 4: Simplify right side
   139,176.30x = 13,417,306,731.58
5. Step 5: Solve for x
   x = 13,417,306,731.58/139,176.30
6. Step 6: Final answer
   x = 96,405.11